By David Wilson, Professor Of Criminology At Birmingham University - I pull up outside a house in the Durham mining village of West Auckland to find an anonymous-looking place: a slim, three-storey family home distinguished from its neighbours only by its pretty, blue-grey paint. There are no clues as to its gruesome past. Even its original house number has been changed, perhaps from fear that the evil that was perpetrated here could pass down through successive generations of residents. This is the home in which Britain’s first serial killer, Mary Ann Cotton, claimed her final victim. It is the house in which she was arrested and then taken away to be incarcerated, before eventually being executed at Durham Jail in March 1873.

Few have heard of the so-called ‘Black Widow’ killer who posed as a wife, widow, mother, friend and nurse to murder perhaps as many as 21 victims, living off her husbands before eventually claiming their estates. Two decades before Jack the Ripper would terrorise the streets of Whitechapel in London, Mary Ann Cotton had already become a killing machine, perhaps murdering as many as eight of her own children, seven stepchildren, her mother, three husbands, a lover – and an inconvenient friend.

Even crime aficionados, those familiar with such names as Shipman, Nilsen, Sutcliffe and West, know little or nothing of her. She has been largely erased from history and remains today only a half-remembered local curiosity even in her native North East.

There is certainly no walking tour retracing her murderous progress through County Durham, nor sad monuments erected to honour the memories of her victims. A woman who should have been a criminal icon has been reduced to little more than a chilling bedtime story and a Northern nursery rhyme: ‘Sing, sing, oh, what can I sing? Mary Ann Cotton is tied up with string. Where, where? Up in the air, sellin’ black puddens a penny a pair.’

A single book marked the centenary of her execution. As one of Britain’s leading criminologists and a former prison governor, I would like to know why. I have worked on police investigations and with many serial killers. Yet even to me, the life and terrible work of Mary Ann Cotton were largely a mystery.

And so throughout the spring and summer last year, I spent time in the North East researching a new book on this woman who travelled from one pit village* to another leaving only gravestones behind her and who, in doing so, gained real, if loathsome, historical importance.

Here is not just the first British serial killer – someone who has killed more than three people in a period greater than 30 days – but the first to exploit and abuse the anonymity of a new industrial age.

Click here to read the rest of the story of Mary Ann Cotton, the 'Black Widow killer.'

'Murder Grew With Her: On The Trail Of Mary Ann Cotton, Britain’s First Serial Killer,' by Professor David Wilson, will be published later this year.

*'Pit Village' is a term used in the UK for villages and towns built up around coal mines.